硬脆性材料功能微结构精密磨削实验  

Experimental Study on Precise Grinding of Functional Microstructure on Hard Brittle Material

作　　者：肖志信[1] 郑煜[2] 李白冰 夏冰心[2] XIAO Zhi-xin;ZHENG Yu;LI Bai-bing(Hunan Lnstitute of Technology,HengYang 421002;State Key Laboratory of High Performance Complex Manufacturing,Central South University,Changsha 410083)

机构地区：[1]湖南工学院,衡阳421002 [2]中南大学高性能复杂制造国家重点实验室,长沙410083

出　　处：《航空精密制造技术》2018年第6期1-5,共5页Aviation Precision Manufacturing Technology

基　　金：国家自然科学基金资助项目(51475479);国家重点研发计划(2017YFB1104800);湖南省重点研发计划(2016GK2098);高性能复杂制造国家重点实验室开发自主课题(ZZYJKT2017-07);大连理工大学精密与特种加工教育部重点实验室开放课题(JMTZ201804)

摘　　要：基于硬脆性材料加工机理分析了其微结构磨削表面精度与磨削工艺的关系,利用压痕法研究硬脆性材料加工的脆塑转变临界条件,在此基础上结合最大切屑厚度h模型及表面粗糙度Ra模型初步确定了磨削加工工艺参数范围。分析了切削速度与工件进给速度对表面粗糙度的影响机制和规律,并针对石英玻璃进行了磨削实验。研究结果表明,在延性域磨削条件下可获得磨削后表面粗糙度为55nm的高质量表面,为硬脆性材料微结构延性域临界磨削条件研究提供了理论参考与试验依据。The relationship between grinding process and surface precision of micro structure was analyzed based on the machining mechanism of hard brittle material.Indentation method was utilized to research the critical condition of crack brittle-ductile transition of processing hard brittle material.Based on this theory,the range of parameter of grinding process was preliminarily determined by the models of micro-grinding maximum chip thickness h and surface roughness Ra.The rule and mechanism how chipping speed and feeding rate impact on the surface roughness were analyzed,and grinding experiments aimed on quartz glasses were carried out The experimental results indicate that in ductile grinding regime high quality surface whose surface roughness is 55 nm can be obtained,and it provides theoretical reference and experimental basis for research on critical grinding conditions for micro structure on hard brittle material in ductile regime.

关 键 词：功能微结构 脆塑转变 磨削工艺 表面粗糙度 

分 类 号：TG161[金属学及工艺—热处理]